Jong, Joy de, author
Coutinho, 2010
Buku Teks
Sayoga
Alumni, 1985
Buku Teks
Hyde, Simeon
Addison-Wesley Publishing Company, Inc., 1967
Buku Teks
Ferre, John P., author
Charles E. Merrill Pub. Co., 1983
Buku Referensi
Day, Robert A., author
ISI Press, 1983
Buku Teks